Gokhan Kirbas - Academia.edu (original) (raw)
Papers by Gokhan Kirbas
Although oil-based drilling fluids are of paramount practical and economical interest, they repre... more Although oil-based drilling fluids are of paramount practical and economical interest, they represent a serious source of pollution, once released into the environment as drill cuttings. The aim of this study is to assess the capability of isolated microorganisms to degrade gasoil fuel. The commonly used physicochemical and biodegradation remediation techniques of petroleum contaminated soil were both investigated. The study revealed that natural biodegradation is favorable. Even though, the presence of heavy metals, the moisture level of (8.55%) and nutrient deficiencies put severe constrains on microorganisms' survival ranges inhibiting the biodegradation process. The selected strains were able to degrade the diesel fuel at significantly high rates (around 98%).
2007 IEEE 15th Signal Processing and Communications Applications, 2007
Page 1. Korelasyon Fonksiyonu Kullanilarak Tikayici Uyku Apne Sendromunda Oksijen Saturasyonu TIe... more Page 1. Korelasyon Fonksiyonu Kullanilarak Tikayici Uyku Apne Sendromunda Oksijen Saturasyonu TIe Hava Akimi Arasindaki Tli kinin Analizi The Correlation Analysis Between Airflow And Oxygen Saturation In Obstructive ...
2009 IEEE 17th Signal Processing and Communications Applications Conference, 2009
... Abdulnasır Yıldız 1, Mehmet Akın 1, Oğuz Poyraz 2, Gokhan Kirbas 3 1 Dicle üniversitesi Elekt... more ... Abdulnasır Yıldız 1, Mehmet Akın 1, Oğuz Poyraz 2, Gokhan Kirbas 3 1 Dicle üniversitesi Elektrik Elektronik Mühendisliği Bölümü, 21280 Diyarbakır abnayil@dicle.edu.tr makin@dicle.edu.tr 2 Sağlık Bakanlığı İlaç ve Eczacılık Genel Müdürlüğü, Dıșkapı Ankara oguz.poyraz ...
2010 IEEE 18th Signal Processing and Communications Applications Conference, 2010
... Hüseyin Acar 1 , Mehmet Akın 1 , Abdulnasır Yıldız 1 , Hakkı Eği 1 , Gökhan Kırbaş 2 1. Elekt... more ... Hüseyin Acar 1 , Mehmet Akın 1 , Abdulnasır Yıldız 1 , Hakkı Eği 1 , Gökhan Kırbaş 2 1. Elektrik-Elektronik Mühendisliği Bölümü Dicle Üniversitesi {hacar,makin,abnayil}@dicle.edu. tr, hakki.egi@emo.org.tr 2. Tıp Fakültesi Dicle Üniversitesi gkirbas@dicle.edu.tr Özetçe ...
Revue du Rhumatisme, 2004
Objectives. -To evaluate the result of rehabilitation on motor and functional improvement in spin... more Objectives. -To evaluate the result of rehabilitation on motor and functional improvement in spinal tuberculosis.
Yonsei Medical Journal, 2009
Tracheobronchopathia osteochondroplastica (TO) is a rare disorder of unknown cause characterized ... more Tracheobronchopathia osteochondroplastica (TO) is a rare disorder of unknown cause characterized by the presence of multiple submucosal osseous and/or cartilaginous nodules that protrude into the lumen of the trachea and large bronchi. A simultaneous diagnosis of TO and amyloidosis is rarely reported. In this report, a case initially suspected to be asthma bronchiole that could not be treated, was radiologically diagnosed as TO, and also secondary amyloidosis is presented. A 53 years, man patient reported a 3 years history of dyspnea. Pulmonary function tests (PFTs) showed an obstructive pattern. Chest X-rays revealed right middle lobe atelectasis. FOB and CT detected nodular lesions in the trachea and in the anterior and lateral walls of the main bronchi. AA amyloidosis was confirmed by endobronchial biopsy. In the abdominal fat pad biopsy, amyloidosis was not detected. Asthma bronchiole was excluded by PFTs. This case illustrates that it is possible for TO and amyloidosis to masquerade as asthma. TO and amyloidosis should be suspected in patients of older ages with asthma and especially with poorly treated asthmatic patients. Although nodular lesions in the anterior and lateral tracheobronchial walls are typical for TO, a biopsy should be obtained to exclude amyloidosis.
Respiration, 2010
Malignant pleural mesothelioma (MPM) has a poor prognosis. Only few studies in literature investi... more Malignant pleural mesothelioma (MPM) has a poor prognosis. Only few studies in literature investigated the presence of pleural fluid and radiographic findings for the prognosis of MPM. We retrospectively investigated the hospital charts of 363 MPM patients who were diagnosed from January 1989 to March 2010. Survival time was calculated by the Kaplan-Meier method. Pretreatment clinical, laboratory and radiographic features of each patient at the time of diagnosis were obtained from patients' charts. The mean age of 363 patients (217 men, 146 women) was 50.6 ± 11.2 years (range 19-85) and the mean survival time was 11.7 ± 8.6 months (range 1-53). Histological types of MPM were epithelial (71.2%), mixed (15.9%) and sarcomatous type (4.9%). The frequency of disease stages were 31.4% for stage 1, 24.2% for stage 2, 28.6% for stage 3 and 15.8% for stage 4. The most frequent symptoms were dyspnea (82.1%), chest pain (68.3%) and weight loss (58.9%). Results of univariate and multivariate analyses revealed that a Karnofsky performance score ≤60, a pleural fluid glucose level ≤40 mg/dl, a C-reactive protein level >50 mg/l, a serum lactate dehydrogenase level >500 U/l, the presence of pleural fluid, pleural thickening >1 cm and a platelet count of >420 × 10(3)/μl were found to be associated with poor prognosis in MPM. Our data suggest that low pleural fluid glucose and high C-reactive protein, the presence of pleural fluid and pleural thickening were associated with poor MPM prognosis. Further prospective studies are needed to highlight prognostic factors more clearly.
PEDIATRICS, 1998
The incidence of tuberculosis in the United States is increasing in all age groups; 5% of all of ... more The incidence of tuberculosis in the United States is increasing in all age groups; 5% of all of these patients have central nervous system involvement. We studied childhood central nervous system tuberculosis between 1979 and 1989 and reviewed the literature for patients up to 14 years of age. The small number of patients reported in this country results in delayed diagnoses because of reduced awareness. Cranial computed tomography within 1 week of initial symptoms may reveal basilar enhancement, hydrocephalus, or infarction. When combined with cerebrospinal fluid findings atypical for common bacterial infection, these radiographic findings support the prompt initiation of antituberculous therapy. Prophylactic considerations are also discussed.
Joint Bone Spine, 2004
To evaluate the result of rehabilitation on motor and functional improvement in spinal tuberculos... more To evaluate the result of rehabilitation on motor and functional improvement in spinal tuberculosis. Prospective case study. Data were collected from 47 patients with spinal tuberculosis medically and/or surgically treated, and rehabilitated over 6 months of period, after spinal decompression and fusion. The main outcome measures were motor development of the patients who were evaluated at the beginning, in the 1st week, in the 3rd month, and in the 6th month. Functional development of the patients was evaluated at the beginning and in the 6th month. Functional assessment was made according to Modified Barthel Index (MBI), and motor examination was made according to American Spinal Injury Association (ASIA). The study population consisted of 47 patients (22 males and 25 females) mean aged 37.9 +/- 18.3 years (range 5-76 years). The most common site of spinal tuberculosis was the thoracic region. Localized back pain, paraparesis, sensory dysfunction and fever were typical clinical manifestations. Surgical management was performed as anterior or posterior drainage of abscess and/or stabilization of the spine. The rehabilitation program was performed in all patients during the preoperative, early postoperative and late postoperative 6 month periods. Muscle-strengthening exercises on necessary localization such as pectoral, abdominal, lower extremities; truncal and sacrospinal extensors were started for the rehabilitation. The motor score for the lower limbs and the MBI scores for activities of daily living (ADL) and mobility improved significantly (P < 0.001). The self-care and mobility categories of the MBI on admission; were 14.8% severely dependent and 10.6% independent. However, at the end of the rehabilitation program, 4.2% were severely dependent and 70.2% independent. Early diagnosis and appropriate medical and/or surgical treatment together with a rehabilitation program will improve the life quality of patients with spinal tuberculosis.
Expert Systems with Applications, 2009
We have developed a new method for automatic estimation of vigilance level by using electroenceph... more We have developed a new method for automatic estimation of vigilance level by using electroencephalogram (EEG), electromyogram (EMG) and eye movement (EOG) signals recorded during transition from wakefulness to sleep. In the previous studies, EEG signals and EEG signals with EMG ...
solunumhastaliklari.org
ÖZET Tüberküloz (tb) plörezinin daha çok primer enfeksiyonun geç bir komplikasyonu olarak ortaya ... more ÖZET Tüberküloz (tb) plörezinin daha çok primer enfeksiyonun geç bir komplikasyonu olarak ortaya çıktığı ve ülkemizde en sık rastlanan plevral effüzyon nedeni olduğu bilinmektedir. Biz de bu çalışmamızda 108 olgumuzu klinik, radyolojik ve labo-ratuvar verileri yönünden ...
solunumhastaliklari.org
ÖZET Tüberküloz (TB) plörezi tanısında plevral sıvı ve plevral biyopsi materyallerinin histopatol... more ÖZET Tüberküloz (TB) plörezi tanısında plevral sıvı ve plevral biyopsi materyallerinin histopatolojik incelemesinin yüksek tanı de-ğeri olmasına rağmen kesin tanı kültür ile konur. Çalışmamızda, 51 plevral efüzyonlu hastada, plevral sıvı ve biyopsi kültürünün tanı ...
solunumhastaliklari.org
Bu çalışmada 161 plevral sıvısı olan olguda plevra aspirasyon ve biyopsisinin tanı değeri tartışı... more Bu çalışmada 161 plevral sıvısı olan olguda plevra aspirasyon ve biyopsisinin tanı değeri tartışılmıştır. Tüm olgularda ortalama yaş 54.57'dir. Olguların 54'ü (%33.54) malign plörezi, 107'si (%66.45) benign plöreziydi. Ellidört malign plörezili olgunun 35'i malign mezotelyoma, 19'u sekonder plevra karsinomuydu. Benign plevra sıvısı olan 107 olgunun 65'i tüberküloz plöreziydi. Malign plörezili olgularda sitolojinin tanı değeri literatürde biyopsiye göre daha yüksek bulunmasına rağmen, bu çalışmada %55.56 olarak tespit edildi. Biyopsinin tanı değeri ise %59.25 olarak hesaplanmıştır. Malign mezotelyoma olgularında sitolojinin tanı değeri %51.42'dir. Tüberkülöz plörezide plevra biyopsi değerli bulunmasına rağmen, diğer benign lezyonlarda hem biyopsi hem de sitolojinin tanıya katkısı sınırlıdır.
Asia-Pacific Journal of Operational Research, 2013
Although oil-based drilling fluids are of paramount practical and economical interest, they repre... more Although oil-based drilling fluids are of paramount practical and economical interest, they represent a serious source of pollution, once released into the environment as drill cuttings. The aim of this study is to assess the capability of isolated microorganisms to degrade gasoil fuel. The commonly used physicochemical and biodegradation remediation techniques of petroleum contaminated soil were both investigated. The study revealed that natural biodegradation is favorable. Even though, the presence of heavy metals, the moisture level of (8.55%) and nutrient deficiencies put severe constrains on microorganisms' survival ranges inhibiting the biodegradation process. The selected strains were able to degrade the diesel fuel at significantly high rates (around 98%).
Although oil-based drilling fluids are of paramount practical and economical interest, they repre... more Although oil-based drilling fluids are of paramount practical and economical interest, they represent a serious source of pollution, once released into the environment as drill cuttings. The aim of this study is to assess the capability of isolated microorganisms to degrade gasoil fuel. The commonly used physicochemical and biodegradation remediation techniques of petroleum contaminated soil were both investigated. The study revealed that natural biodegradation is favorable. Even though, the presence of heavy metals, the moisture level of (8.55%) and nutrient deficiencies put severe constrains on microorganisms' survival ranges inhibiting the biodegradation process. The selected strains were able to degrade the diesel fuel at significantly high rates (around 98%).
2007 IEEE 15th Signal Processing and Communications Applications, 2007
Page 1. Korelasyon Fonksiyonu Kullanilarak Tikayici Uyku Apne Sendromunda Oksijen Saturasyonu TIe... more Page 1. Korelasyon Fonksiyonu Kullanilarak Tikayici Uyku Apne Sendromunda Oksijen Saturasyonu TIe Hava Akimi Arasindaki Tli kinin Analizi The Correlation Analysis Between Airflow And Oxygen Saturation In Obstructive ...
2009 IEEE 17th Signal Processing and Communications Applications Conference, 2009
... Abdulnasır Yıldız 1, Mehmet Akın 1, Oğuz Poyraz 2, Gokhan Kirbas 3 1 Dicle üniversitesi Elekt... more ... Abdulnasır Yıldız 1, Mehmet Akın 1, Oğuz Poyraz 2, Gokhan Kirbas 3 1 Dicle üniversitesi Elektrik Elektronik Mühendisliği Bölümü, 21280 Diyarbakır abnayil@dicle.edu.tr makin@dicle.edu.tr 2 Sağlık Bakanlığı İlaç ve Eczacılık Genel Müdürlüğü, Dıșkapı Ankara oguz.poyraz ...
2010 IEEE 18th Signal Processing and Communications Applications Conference, 2010
... Hüseyin Acar 1 , Mehmet Akın 1 , Abdulnasır Yıldız 1 , Hakkı Eği 1 , Gökhan Kırbaş 2 1. Elekt... more ... Hüseyin Acar 1 , Mehmet Akın 1 , Abdulnasır Yıldız 1 , Hakkı Eği 1 , Gökhan Kırbaş 2 1. Elektrik-Elektronik Mühendisliği Bölümü Dicle Üniversitesi {hacar,makin,abnayil}@dicle.edu. tr, hakki.egi@emo.org.tr 2. Tıp Fakültesi Dicle Üniversitesi gkirbas@dicle.edu.tr Özetçe ...
Revue du Rhumatisme, 2004
Objectives. -To evaluate the result of rehabilitation on motor and functional improvement in spin... more Objectives. -To evaluate the result of rehabilitation on motor and functional improvement in spinal tuberculosis.
Yonsei Medical Journal, 2009
Tracheobronchopathia osteochondroplastica (TO) is a rare disorder of unknown cause characterized ... more Tracheobronchopathia osteochondroplastica (TO) is a rare disorder of unknown cause characterized by the presence of multiple submucosal osseous and/or cartilaginous nodules that protrude into the lumen of the trachea and large bronchi. A simultaneous diagnosis of TO and amyloidosis is rarely reported. In this report, a case initially suspected to be asthma bronchiole that could not be treated, was radiologically diagnosed as TO, and also secondary amyloidosis is presented. A 53 years, man patient reported a 3 years history of dyspnea. Pulmonary function tests (PFTs) showed an obstructive pattern. Chest X-rays revealed right middle lobe atelectasis. FOB and CT detected nodular lesions in the trachea and in the anterior and lateral walls of the main bronchi. AA amyloidosis was confirmed by endobronchial biopsy. In the abdominal fat pad biopsy, amyloidosis was not detected. Asthma bronchiole was excluded by PFTs. This case illustrates that it is possible for TO and amyloidosis to masquerade as asthma. TO and amyloidosis should be suspected in patients of older ages with asthma and especially with poorly treated asthmatic patients. Although nodular lesions in the anterior and lateral tracheobronchial walls are typical for TO, a biopsy should be obtained to exclude amyloidosis.
Respiration, 2010
Malignant pleural mesothelioma (MPM) has a poor prognosis. Only few studies in literature investi... more Malignant pleural mesothelioma (MPM) has a poor prognosis. Only few studies in literature investigated the presence of pleural fluid and radiographic findings for the prognosis of MPM. We retrospectively investigated the hospital charts of 363 MPM patients who were diagnosed from January 1989 to March 2010. Survival time was calculated by the Kaplan-Meier method. Pretreatment clinical, laboratory and radiographic features of each patient at the time of diagnosis were obtained from patients' charts. The mean age of 363 patients (217 men, 146 women) was 50.6 ± 11.2 years (range 19-85) and the mean survival time was 11.7 ± 8.6 months (range 1-53). Histological types of MPM were epithelial (71.2%), mixed (15.9%) and sarcomatous type (4.9%). The frequency of disease stages were 31.4% for stage 1, 24.2% for stage 2, 28.6% for stage 3 and 15.8% for stage 4. The most frequent symptoms were dyspnea (82.1%), chest pain (68.3%) and weight loss (58.9%). Results of univariate and multivariate analyses revealed that a Karnofsky performance score ≤60, a pleural fluid glucose level ≤40 mg/dl, a C-reactive protein level >50 mg/l, a serum lactate dehydrogenase level >500 U/l, the presence of pleural fluid, pleural thickening >1 cm and a platelet count of >420 × 10(3)/μl were found to be associated with poor prognosis in MPM. Our data suggest that low pleural fluid glucose and high C-reactive protein, the presence of pleural fluid and pleural thickening were associated with poor MPM prognosis. Further prospective studies are needed to highlight prognostic factors more clearly.
PEDIATRICS, 1998
The incidence of tuberculosis in the United States is increasing in all age groups; 5% of all of ... more The incidence of tuberculosis in the United States is increasing in all age groups; 5% of all of these patients have central nervous system involvement. We studied childhood central nervous system tuberculosis between 1979 and 1989 and reviewed the literature for patients up to 14 years of age. The small number of patients reported in this country results in delayed diagnoses because of reduced awareness. Cranial computed tomography within 1 week of initial symptoms may reveal basilar enhancement, hydrocephalus, or infarction. When combined with cerebrospinal fluid findings atypical for common bacterial infection, these radiographic findings support the prompt initiation of antituberculous therapy. Prophylactic considerations are also discussed.
Joint Bone Spine, 2004
To evaluate the result of rehabilitation on motor and functional improvement in spinal tuberculos... more To evaluate the result of rehabilitation on motor and functional improvement in spinal tuberculosis. Prospective case study. Data were collected from 47 patients with spinal tuberculosis medically and/or surgically treated, and rehabilitated over 6 months of period, after spinal decompression and fusion. The main outcome measures were motor development of the patients who were evaluated at the beginning, in the 1st week, in the 3rd month, and in the 6th month. Functional development of the patients was evaluated at the beginning and in the 6th month. Functional assessment was made according to Modified Barthel Index (MBI), and motor examination was made according to American Spinal Injury Association (ASIA). The study population consisted of 47 patients (22 males and 25 females) mean aged 37.9 +/- 18.3 years (range 5-76 years). The most common site of spinal tuberculosis was the thoracic region. Localized back pain, paraparesis, sensory dysfunction and fever were typical clinical manifestations. Surgical management was performed as anterior or posterior drainage of abscess and/or stabilization of the spine. The rehabilitation program was performed in all patients during the preoperative, early postoperative and late postoperative 6 month periods. Muscle-strengthening exercises on necessary localization such as pectoral, abdominal, lower extremities; truncal and sacrospinal extensors were started for the rehabilitation. The motor score for the lower limbs and the MBI scores for activities of daily living (ADL) and mobility improved significantly (P < 0.001). The self-care and mobility categories of the MBI on admission; were 14.8% severely dependent and 10.6% independent. However, at the end of the rehabilitation program, 4.2% were severely dependent and 70.2% independent. Early diagnosis and appropriate medical and/or surgical treatment together with a rehabilitation program will improve the life quality of patients with spinal tuberculosis.
Expert Systems with Applications, 2009
We have developed a new method for automatic estimation of vigilance level by using electroenceph... more We have developed a new method for automatic estimation of vigilance level by using electroencephalogram (EEG), electromyogram (EMG) and eye movement (EOG) signals recorded during transition from wakefulness to sleep. In the previous studies, EEG signals and EEG signals with EMG ...
solunumhastaliklari.org
ÖZET Tüberküloz (tb) plörezinin daha çok primer enfeksiyonun geç bir komplikasyonu olarak ortaya ... more ÖZET Tüberküloz (tb) plörezinin daha çok primer enfeksiyonun geç bir komplikasyonu olarak ortaya çıktığı ve ülkemizde en sık rastlanan plevral effüzyon nedeni olduğu bilinmektedir. Biz de bu çalışmamızda 108 olgumuzu klinik, radyolojik ve labo-ratuvar verileri yönünden ...
solunumhastaliklari.org
ÖZET Tüberküloz (TB) plörezi tanısında plevral sıvı ve plevral biyopsi materyallerinin histopatol... more ÖZET Tüberküloz (TB) plörezi tanısında plevral sıvı ve plevral biyopsi materyallerinin histopatolojik incelemesinin yüksek tanı de-ğeri olmasına rağmen kesin tanı kültür ile konur. Çalışmamızda, 51 plevral efüzyonlu hastada, plevral sıvı ve biyopsi kültürünün tanı ...
solunumhastaliklari.org
Bu çalışmada 161 plevral sıvısı olan olguda plevra aspirasyon ve biyopsisinin tanı değeri tartışı... more Bu çalışmada 161 plevral sıvısı olan olguda plevra aspirasyon ve biyopsisinin tanı değeri tartışılmıştır. Tüm olgularda ortalama yaş 54.57'dir. Olguların 54'ü (%33.54) malign plörezi, 107'si (%66.45) benign plöreziydi. Ellidört malign plörezili olgunun 35'i malign mezotelyoma, 19'u sekonder plevra karsinomuydu. Benign plevra sıvısı olan 107 olgunun 65'i tüberküloz plöreziydi. Malign plörezili olgularda sitolojinin tanı değeri literatürde biyopsiye göre daha yüksek bulunmasına rağmen, bu çalışmada %55.56 olarak tespit edildi. Biyopsinin tanı değeri ise %59.25 olarak hesaplanmıştır. Malign mezotelyoma olgularında sitolojinin tanı değeri %51.42'dir. Tüberkülöz plörezide plevra biyopsi değerli bulunmasına rağmen, diğer benign lezyonlarda hem biyopsi hem de sitolojinin tanıya katkısı sınırlıdır.
Asia-Pacific Journal of Operational Research, 2013
Although oil-based drilling fluids are of paramount practical and economical interest, they repre... more Although oil-based drilling fluids are of paramount practical and economical interest, they represent a serious source of pollution, once released into the environment as drill cuttings. The aim of this study is to assess the capability of isolated microorganisms to degrade gasoil fuel. The commonly used physicochemical and biodegradation remediation techniques of petroleum contaminated soil were both investigated. The study revealed that natural biodegradation is favorable. Even though, the presence of heavy metals, the moisture level of (8.55%) and nutrient deficiencies put severe constrains on microorganisms' survival ranges inhibiting the biodegradation process. The selected strains were able to degrade the diesel fuel at significantly high rates (around 98%).